The Proto B327227 1/2-inch drive impact extension measures 2-11/16 inches in length, giving you the reach needed to access fasteners in tight or recessed locations. The male square is oriented in-line with the female square for compatibility with fixed-head torque wrenches, while a full chamfer at the drive opening ensures easy engagement with drive tools.
Four detents and a drive end chamfer provide quick, positive socket engagement on any drive wall, eliminating slippage during use. A side locking hole adds retention security, and the size is stamped directly on the tool for fast identification on the job site.